Vulnerability Name:

CVE-2020-27348 (CCN-192652)

Assigned:2020-10-26
Published:2020-10-26
Updated:2020-12-14
Summary:In some conditions, a snap package built by snapcraft includes the current directory in LD_LIBRARY_PATH, allowing a malicious snap to gain code execution within the context of another snap if both plug the home interface or similar. This issue affects snapcraft versions prior to 4.4.4, prior to 2.43.1+16.04.1, and prior to 2.43.1+18.04.1.
CVSS v3 Severity:6.8 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:L)
5.9 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:L/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): Required
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): Low
9.8 Critical (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
8.5 High (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
CVSS v2 Severity:4.4 Medium (CVSS v2 Vector: AV:L/AC:M/Au:N/C:P/I:P/A:P)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): Partial
10.0 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
Vulnerability Type:CWE-427
Vulnerability Consequences:Gain Access
References:Source: MITRE
Type: CNA
CVE-2020-27348

Source: MISC
Type: Exploit, Issue Tracking, Third Party Advisory
https://bugs.launchpad.net/bugs/1901572

Source: CCN
Type: Snapcraft Bug #1901572
snapd vulnerable to Library Injection from CWD

Source: XF
Type: UNKNOWN
snapcraft-cve202027348-code-exec(192652)

Source: CCN
Type: snapcraft GIT Repository
project_loader, formatting_utils: take empty env values into account #3345

Source: MISC
Type: Third Party Advisory
https://github.com/snapcore/snapcraft/pull/3345

Source: MISC
Type: Patch, Third Party Advisory
https://usn.ubuntu.com/usn/usn-4661-1

Vulnerable Configuration:Configuration 1:
  • cpe:/a:canonical:snapcraft:*:*:*:*:*:*:*:* (Version < 4.4.4)

    • Configuration 2:
  • cpe:/o:canonical:ubuntu_linux:16.04:*:*:*:*:*:*:*
  • OR cpe:/o:canonical:ubuntu_linux:18.04:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    canonical snapcraft *
    canonical ubuntu linux 16.04
    canonical ubuntu linux 18.04